Rotary-cutter machine.



L. 1. BARlBAu'LT. ROTARY CUTTER MACHINE. APPUCATIDN HLED DECJ. 1915.

Paten'd Oct. 23.1911.

2 SHEETS-SHEET 1 WITNESSES ATTORNEY Patented Oct 23,1917

2 SHETS-SHEET 2 INVENTH u ATTQRNEY l-M l Mm 1H. UAH AMD Y RT. Am B, BUICN IJVIW .RT A Lum 0m RP A MJ. .NJ

lWITNESSES LUCIEN J'. BABIBA'ULT, OF NEW HAVEN, CONNECTICUT.

ROTARY-CUTTER MACHINE.

lApplication led December 7, 1915.

tain new and useful Improvements in Rotary-Cutter Machines, of which thefollowing is a specification.

An object of my invention is to provide a rotary cutter machine for woodworking,

the same being of a typeand size to be portable and manually operatedafter the manner of a grooving plane or matching plane and a partthereof being so arranged that power is applied to the rotary cutter bymechanical means, thus making it necessary only to guide the machine byhand over the stock-to be worked.

AA further object .is to construct the parts to be adjustableto regulatethe depth of cut and also ,the position at which the tool operates uponthestock Vwith respect to a gage or guide formed as a part of theinachine.

A still further object is to provideva rotary cutter tool which ismounted on the rotatmg parts to be removable yand to have fitted inplace thereof interchangeable tools having varied cutting contours tothus adapt the machine to a variety of uses.

Yet another object is to form a shield as a portion. of-` the structure,which shield is arranged to catch the cuttings or shavings as thrown outby the tool and conveying or directing the same to one side of the pathof operation.

With other objects in view which will be referred to, my inventionconsists in certain novel features of construction and combinations ofparts which will be hereinafter set forth in combination with theaccompanying drawings and more particularly pointed out in the claim.

Inrthe drawings:

Figure 1 is a view in side elevation of the machine.

Fig. 2 is a view in top plan.

Fig. 3 is a view partly in section on the line 3 3 of Fig. 1.

The block 1 of the plane is in the form of a rectangular plate having anupstanding bracket 2 at one side thereof, and these parts are preferablyof cast metal. A handle 3 is mounted on the rear end of the block 1 andat a point forwardly of the handle and in proximity to the bracket 2Specification of Letters Patent.

Patented Oct. 23, 1917.

Serial No. 65,559.

the block has the elongated slot 4 formed therethrough.

The motive power employed in the present instance is the electric motor5 which may be attached by the cord G to a standard socket or to anyother suitable source of current. The bearing 7 is formed to extendtransversely from one edge of the block 1 at a point in advance of thehandle 3 and a supporting bracket 8 secured by the screws 9 or in anyother desired manner to the case of the motor 5 has a pivot stud 10extending from one side thereof to be received in the bearing 7 to pivotthe motor to the block adjacent the bracket 2,v a nut 11 being screwedonto the end of the stud 10 to hold the parts against displacement. Thebracket plate 2 has an arcuated slot 12 formed therethrough and thisslot is arched around the bearing 7 as a center and is so positionedthat the shaft 13 of the motor is received therethrough and thus themotor may be rocked up and down around the stud 10 and the shaft 13 willhave movement in the arcuated slot.

The rotary cutter 111 is mounted on the end of the motor shaft 13 and isheld in place thereon by a nut 15 or in any other approved manner, theparts being so positioned that the cutting teeth or blades 16 of therotary cutter 14 will work through the slotted opening 4 of the block 1and as the motor is swung around its pivotal mounting the cutter will beprojected below -the smoothing face 17 of the block a greater or lesserdistance. An upstanding adjusting bracket 18 is formed as a part of themain bracket plate 2 of the block and has a slot 19 preferably arcuatedto be throughout its length at a given radius from the pivotal center ofmounting of the motor. A screw threaded stud 20 is carried on a support21 which is secured by the screws 22 on the motor casing in a positionthat the stud projects through the slot 19 and will work therein as themotor is rocked upon its mounting, a thumb nut 22 being screwed onto thestud 20 to permit clamping of the parts to retain the motor shaft 13 andthe cutter 14C carried thereby in a fixed position of projection belowthe smoothing face 17 of the block.

It is often desirable to make very fine adjustments of the cuttingdepth, as for instance where the machine is to be used to prepare agroove for line inlay or other fine cabinet work, and to accomplish thisline variation of the settings of the parts the adjusting screw 23 isvthreaded through a screw threaded oriliee 2i in the adjusting bracket18 and has its inner end bear-mg against the stud 20, a hand wheel 2.3being provided on the outer end of this adjusting screw to permittur-ning thereof. AS an added precaution to retain the settings of thedepth of projection of the cutter 14:, a locking nut 26 is provided onthe adj-usting screw 23 to be set dou-'n against the adjusting bracket18 to prevent turning of the screw.

In the majority of cases where the machine will be used, the cut of thetool will be desired at a given distance from a straight edge, whichedge will in most cases be one edge of the stock being operated upon,and I have therefore provided with gage or guide 27 disposed against thesmoothing face of the block and arranged to be adjustable.. Theadjustment of the gage member is perhaps more particularly illustratedin F ig. 3, and as here shown the adjusting hars 28 are connected withthe gage 27 by a substantially U-shaped formation 29 which spaces theadjusting bars from the gage structure and these gage bars are mountedin the transversely extending guide grooves formed across the upper sidegf the block 1. The adjusting bars 28 have adjusting slots 31 formedlongitudinally thereof and the clamp screws 32 are carried by the block1 toV be received through these adjusting slots and to have the clampnuts 33 screwed on the upper ends thereof to permit setting of theadjusting bars to hold the desired adjustment'of gage 27.

A. guard shield 34 constructed of metal and made in the form of atruncated cone has one side thereof cut away as at 35 to permit tting ofthe shield over the cutter tool 14 with the smaller end against thebracket plate 2 and the cut away portion bearing against the upper faceof the block 1. A spring finger 36 is secured to the bracket plate 2 toextend over the shield 34; and has a spring clip 37 carried at the outerend thereof to engage with this shield 34 and hold the same in theproper relation, a handle 38 being provided to permit raising of theclip against the tension exerted by the finger 36 and to thus permitremovalof the shield 84. This shield is purposely made of the tapered ortruncated cone shape so that as the cuttings or shavings are thrown upby the cutting tool they will be caught Within the shield and Will becarried by a centrifugal movement to be discharged at the outer open endof the shield and thus will pass to one side of the block and out of theoperative path of the machine.

In the use of the machine, the cutter is adjusted to have the cuttingteeth 16 thereof project below the smoothing face of the block to theproper distance, through the medium of the-adjusting means carried bythe adjusting bracket 1S; the clamp nuts 38 are loosened and the gage 27is moved to the proper point to obtain the desire(l adjusting of thecutting power of the too-l in the movement of the machine over the stockand upon tightening of these thumb nuts the gage is secured in thedesired adjusted position to form a guide and to hold the machine in theproper opera-tive path, the power to the motor is then turned andthrough the mounting of the cutting tool 14 on the shaft 13 of the motorrotary cutting movement is given thereto. By moving 'the machine overthe stock, the cutting edges 16 of the tool out away the width and sinkthe tool to the proper depth that the smoothing face 17 of the blockgoes to rest against the vface of the stock and then by movement of theblock in a forward direction the proper cut is made, the fact thatthc/teeth are cutting against the direction of movement tending to holdthe machine down against the stock and at the same time assuring thatthe proper cut is made regardless of the speed of movement of themachine over the stock.

By providing a plurality v-of 4cutters having `various cutting contours,the' machine may be adapted to cut grooves for `fine inlay work, togroove Window sashes for Weather strips, for cutting light moldings, todress board edges with either a tongue groove'or ship-lap joint and in anumber of various other connections Where it is possible to accomplishthe desired cut only by the use of power operated machines or throughvery lallporious effort with a hand plane" or the li e. i l

IVhile I have herein shown and described only one form of the inventionit will be understood that variations and modifications might beresorted to in the cutter operating mechanism and in the various otherparts o'f the structure Without departing from the spirit and scope ofmy invention and hence I do not wish'to be limited to the disclosureexcept in such points as may bel'limited by the claim.

I claim:

In a cutter of the class described, a base plate having an upstandingmain bracket at one side thereof and a handle at one end, said platehaving a longitudinally extending slot in advance of said handle and inproximity to said bracket, a bearing extendmg transversely from the edgeof said plate which carries said bracket between the bracket and thehandle, a motor havin-g a pivot stud fixed thereto and mounted toIrotate in said bearing, whereby the motor swings in a vertical plane,said bracket having an arcuate slot arched around said bearing as acenter, a shaft projecting from the and an adjusting element threadedthrough said auxiliary bracket in a plane at right angles to the stud inposition to engage said 15 stud and control the cutting depth of thetool.

In testimony7 whereof I affix my signature in presence of two Witnesses.

LUCIEN J. BARIBAULT.

Witnesses:

EDWARD E. GILMOND, JonT T. MUNIGLE.

Ooples of this patent may be obtained for ve cents each, by addressingthe Commissioner o! Patents, Washington, D. C.

